FLIGHT TEST EVALUATION OF FLUSH MOUNTED LUNEBERG LENS ANTENNA FOR PWI/CAS SYSTEM

Abstract

The operation of the Pilot Warning Instrument/Collision Avoidance System (PWI/CAS) is based on a unique dual antenna. This unit consists of a directional scanning antenna (Luneberg lens) and an omnidirectional antenna combined in a flush mounted assembly. Two modified APN-121 dual antennas were flight tested to determine the adequacy and suitability of this type of antenna for the PWI/CAS system. Two FAA aircraft of the JC-131 type were fitted with the modified antennas. A compatible X-band interrogator (APW-18) and a transponder (APQ-16) were used to provide signal sources and signal detectors. The communication coverage volume provided by the two antennas was determined by flying the aircraft towards each other in a series of non-collision and collision courses. The results of the flight test program demonstrate that the dual antenna is both adequate and suitable for the PWI/CAS. (Author)

Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1961
Accession Number
AD0272777

Entities

Organizations

  • Sperry Corporation

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Aircrafts
  • Antennas
  • Collision Avoidance
  • Collision Avoidance Systems
  • Collisions
  • Detectors
  • Directional
  • Lens Antennas
  • Luneberg Lens Antennas
  • Omnidirectional
  • Omnidirectional Antennas
  • Scanning
  • Warning Systems
  • X Band

Readers

  • Aerospace Engineering
  • Electromagnetic Wave Scattering and Antenna Radiation Engineering
  • Forest Ecology